Bacillus spp. Potentiate the Virulence and Intracellular Invasion of A. paragallinarum in Chickens
文献类型： 外文期刊
作者： Zhu, Jiajia 1 ; Liu, Ying 2 ; Gao, Ting 1 ; Chen, Yunsheng 3 ; Yang, Keli 1 ; Liu, Wei 1 ; Zhu, Kui 3 ; Zhou, Danna 1 ;
作者机构： 1.Hubei Acad Agr Sci, Inst Anim Husb & Vet Med, Wuhan 430064, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Anim Husb & Vet Med, Beijing 100097, Peoples R China
3.China Agr Univ, Coll Vet Med, Beijing 100193, Peoples R China
关键词：
期刊名称：ANIMALS （ 影响因子：2.7； 五年影响因子：3.2 ）
ISSN： 2076-2615
年卷期： 2025 年 15 卷 14 期
页码：
收录情况： SCI
摘要： Coinfection poses severe threats to poultry health, particularly due to the complexity and resilience of multispecies interactions, increasing the difficulty of treatment. Haemophilus spp., a heterotrophic bacterium, heavily relies on extracellular growth factors acquired from other organisms or its surrounding environment. Although coinfections by Avibacterium paragallinarum and Bacillus have been reported, the underlying mechanism of the cooperative interaction remains poorly understood. In this study, we characterized the growth-promoting properties and nicotinamide adenine dinucleotide production of some Bacillus species, including probiotic Bacillus, to evaluate the feasibility of A. paragallinarum coinfection in vitro. Meanwhile, we determined the minimum inhibitory concentration (MIC) and population dynamics of cocultured Bacillus and A. paragallinarum to assess the effect of bacterial interactions on antibiotic efficacy. Additionally, we demonstrated that B. cereus aggravates rhinitis symptoms in chickens infected with A. paragallinarum. Our findings reveal that Bacillus spp.-derived metabolites sustain A. paragallinarum growth and enhance its survival, thereby highlighting the infection risks associated with Bacillus colonization in the respiratory tract.
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